Movement of saline water into rivers, freshwater lakes, estuaries or coastal freshwater aquifers. This may occur when river flows are low in coastal areas or when there is excessive groundwater pumping in coastal or arid areas.

The invasion of fresh surface or ground water by salt water. If it comes from the ocean it may be called sea water intrusion.

Process by which an aquifer is overdrafted creating a flow imbalance within an area that results in salt water encroaching into fresh water supply.

Subject: The Earth The invasion of fresh, surface, or groundwater by salt water.[ Pics List

The invasion of salt water into a body of fresh water, occurring in either surface or goundwater bodies.